diff --git a/Sources/HonkPerf.NET.RefLinq/Enumerators/HashSetEnumerator.cs b/Sources/HonkPerf.NET.RefLinq/Enumerators/HashSetEnumerator.cs
new file mode 100644
index 0000000..9f533cd
--- /dev/null
+++ b/Sources/HonkPerf.NET.RefLinq/Enumerators/HashSetEnumerator.cs
@@ -0,0 +1,25 @@
+namespace HonkPerf.NET.RefLinq.Enumerators;
+
+public struct HashSetEnumerator<T> : IRefEnumerable<T>
+{
+    private T curr;
+    private HashSet<T>.Enumerator ie;
+	
+    public HashSetEnumerator(HashSet<T> set)
+    {
+        ie = set.GetEnumerator();
+        curr = default;
+    }
+	
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool MoveNext()
+    {
+        bool t = ie.MoveNext();
+        curr = ie.Current;
+        if(!t)
+        	ie.Dispose();
+        return t;
+    }
+	
+    public T Current => curr;
+}
diff --git a/Sources/HonkPerf.NET.RefLinq/ToRefLinq.cs b/Sources/HonkPerf.NET.RefLinq/ToRefLinq.cs
index 25955cc..f1afeec 100644
--- a/Sources/HonkPerf.NET.RefLinq/ToRefLinq.cs
+++ b/Sources/HonkPerf.NET.RefLinq/ToRefLinq.cs
@@ -10,6 +10,8 @@ public static RefLinqEnumerable<T, IReadOnlyListEnumerator<T>> ToRefLinq<T>(this
         => new(new(c));
     public static RefLinqEnumerable<T, ArrayEnumerator<T>> ToRefLinq<T>(this T[] c)
         => new(new(c));
+    public static RefLinqEnumerable<T, HashSetEnumerator<T>> ToRefLinq<T>(this HashSet<T> c) 
+        => new(new(c));
 
     public unsafe static RefLinqEnumerable<T, FixedReadOnlySpanEnumerator<T>> ToRefLinq<T>(this FixedReadOnlySpan<T> c)
         where T : unmanaged